Slawsonite Benna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E American Mineralogist 92 (2007) 1190-1199 The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions Sample: P = 6.2 GPa Locality: synthetic _database_code_amcsd 0004410 CELL PARAMETERS: 8.1280 12.6710 13.8660 90.000 114.980 90.000 SPACE GROUP: I2/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 1294.470 Density (g/cm3): 3.245 MAX. ABS. INTENSITY / VOLUME**2: 9.723188248 RIR: 0.976 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 13.98 29.60 6.3355 0 2 0 2 14.09 8.80 6.2845 0 0 2 2 15.79 19.97 5.6140 -1 1 2 4 19.90 16.46 4.4617 0 2 2 4 22.23 6.79 3.9992 -2 0 2 2 23.23 1.01 3.8289 1 1 2 4 24.16 8.44 3.6838 2 0 0 2 24.29 32.81 3.6643 1 3 0 4 25.44 25.57 3.5016 -1 3 2 4 26.35 16.08 3.3818 -2 2 2 4 26.66 61.81 3.3436 -1 1 4 4 28.02 100.00 3.1846 2 2 0 4 28.17 8.34 3.1677 0 4 0 2 28.40 49.89 3.1422 0 0 4 2 28.51 46.06 3.1311 -2 0 4 2 30.72 49.07 2.9106 1 3 2 4 31.63 21.62 2.8287 0 4 2 4 31.79 2.44 2.8150 0 2 4 4 31.88 4.50 2.8070 -2 2 4 4 33.44 33.79 2.6796 -1 3 4 4 33.85 4.84 2.6479 -3 1 2 4 35.97 11.24 2.4968 2 2 2 4 36.17 41.54 2.4831 -2 4 2 4 36.20 12.18 2.4814 1 1 4 4 36.37 11.54 2.4704 -3 1 4 4 37.30 4.71 2.4110 3 1 0 4 38.32 14.66 2.3491 -1 5 2 4 39.50 3.68 2.2815 -2 0 6 2 39.53 11.44 2.2795 -3 3 2 4 40.10 4.88 2.2484 -1 1 6 4 41.61 5.01 2.1706 1 3 4 4 41.75 4.59 2.1633 -3 3 4 4 42.10 7.39 2.1465 -2 2 6 4 42.16 17.25 2.1433 1 5 2 4 42.82 13.20 2.1118 0 6 0 2 43.90 6.42 2.0622 2 4 2 4 44.27 5.03 2.0458 -1 5 4 4 45.07 2.66 2.0117 -4 0 2 2 45.12 2.22 2.0095 -1 3 6 4 45.15 2.03 2.0083 2 0 4 2 45.30 5.07 2.0018 0 6 2 4 45.54 6.58 1.9918 3 1 2 4 45.61 1.34 1.9889 0 2 6 4 47.42 6.67 1.9173 -4 2 2 4 47.49 6.57 1.9144 2 2 4 4 47.69 5.23 1.9069 -4 2 4 4 48.66 3.99 1.8713 -3 3 6 4 48.76 2.76 1.8674 -2 6 2 4 49.25 3.03 1.8502 -3 5 2 4 49.49 9.72 1.8419 4 0 0 2 50.12 5.21 1.8200 3 3 2 4 50.29 5.98 1.8145 -4 0 6 2 50.60 5.93 1.8041 1 1 6 4 51.00 5.24 1.7906 1 5 4 4 51.13 5.68 1.7864 -3 5 4 4 52.19 3.43 1.7528 0 6 4 4 52.25 3.03 1.7508 -2 6 4 4 52.36 7.82 1.7473 0 4 6 4 52.46 1.82 1.7443 -4 2 6 4 52.63 1.29 1.7389 -1 7 2 4 52.82 17.72 1.7332 -2 0 8 2 54.00 5.23 1.6982 -4 4 2 4 54.07 2.41 1.6962 2 4 4 4 54.25 2.80 1.6909 -4 4 4 4 54.92 1.30 1.6718 -2 2 8 4 56.97 1.23 1.6164 3 1 4 4 57.17 5.37 1.6112 -3 5 6 4 57.21 1.23 1.6103 -5 1 4 4 57.43 3.49 1.6046 -1 7 4 4 57.80 1.99 1.5951 4 0 2 2 58.25 3.50 1.5839 0 8 0 2 58.43 1.35 1.5794 -5 1 2 4 58.49 4.70 1.5781 3 5 2 4 60.74 4.52 1.5249 0 2 8 4 60.93 2.68 1.5204 3 3 4 4 60.96 4.72 1.5198 -4 2 8 4 61.16 3.13 1.5154 -5 3 4 4 61.19 3.38 1.5146 2 2 6 4 62.44 2.35 1.4872 0 6 6 4 63.15 1.79 1.4722 1 7 4 4 63.26 1.92 1.4699 -3 7 4 4 63.88 3.88 1.4573 -5 3 6 4 63.91 2.02 1.4566 -4 6 2 4 63.99 9.55 1.4551 2 8 0 4 66.27 1.57 1.4104 1 1 8 4 66.59 1.08 1.4043 -5 1 8 4 66.86 4.05 1.3994 2 4 6 4 67.30 1.03 1.3913 5 3 0 4 67.47 3.83 1.3881 4 6 0 4 69.16 2.55 1.3584 4 0 4 2 69.42 2.22 1.3538 -6 0 4 2 69.82 1.24 1.3471 3 7 2 4 70.26 2.94 1.3398 -2 6 8 4 71.22 1.64 1.3239 -5 5 6 4 72.46 3.74 1.3044 -1 9 4 4 72.67 1.22 1.3011 -2 8 6 4 74.49 2.58 1.2738 -1 3 10 4 74.95 1.31 1.2671 0 10 0 2 75.08 1.06 1.2652 2 0 8 2 75.49 1.16 1.2594 -6 0 8 2 76.62 3.66 1.2436 2 8 4 4 76.77 3.27 1.2416 -4 8 4 4 77.74 1.99 1.2285 -4 4 10 4 79.01 1.42 1.2119 -3 5 10 4 79.51 1.36 1.2055 6 2 0 4 79.89 1.11 1.2007 -5 3 10 4 84.65 2.14 1.1449 6 4 0 4 87.44 1.51 1.1154 0 8 8 4 87.64 1.42 1.1134 -4 8 8 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.